Aerosol bomb



Feb. 11, 1958 N. w. SEAQUIST *AEROSOL BOMB Filed June 25, 1954 IN V ENTOR. W

United States Patent AEROSOL BOMB Nels W. Seaquist, Crys taihake, IllApplication June 25, 1954, No. 439;;247

8 Claims. (Cl. 222139.

This invention relates to aerosol bombs, and; more particularly to novelmeans for preventing development of dangerous pressure in such a bombcaused by aecidlental overheating thereof, as by fire or other means.

According to prior art practices, such a bomb generally contains aliquid to be dispensed dissolved in a low boiling point propellentliquid such as Freon or ether. Thus at room temperature wheneverpressure inthe container of the bomb drops below a predetermined value,due to dispensing of the contents, the propellent liquid boils until thepressure again reaches said value.

However, shipment and storage. of such a bomb are hazardous because whensubjected to higher thanroom temperatures of 160 F. or more dependingupon the construction of the container, the latter will explode causinggreat risk to adjacent people and articles. For this reason, such bombscannot be mailed'despite the great demand therefor on a mail orderbasis;

Accordingly, a primary object Of" the present invention is to releasepressure within the bomb before the temperature thereof reaches adangerously high value.

Another object of the invention is to utilize'the sealed connectionbetween the bomb container and its dispensing valve for releasingpressure in the bomb at a predetermined temperature value.

A more specific object of the invention is to seal the container aroundits opening which receives the valve body by compressing a resilientgasket around the body and by maintaining such compression with afusible washer which melts to release compression ofthe gasket beforethe temperature of the container reaches a dangerous value. i

The foregoing and other objects and advantages of the invention willbecome apparent from a consideration of the following specificationandaccoinpanying drawings, wherein: Y i

Figure 1 is a perspective view of an aerosol'bomb em bodying a preferredform of the invention;

Figure 2 is a sectional'view on-l'ine- 2-2 of- Figure 1;

Figure 3 is a View similar to Figure 2 but showing the fusible washermelted to release pressure in the container; and

Figures 4 to 6 are sectional views, respectively, corresponding toFigure 2, but illustrating modifications of the invention.

Describing the invention in detail and referring first to Figures 1-3,it will be seen that the novel aerosol bomb comprises a conventionalcontainer member 2 having an opening 4 for the reception of a flangeportion 6 of a valve body member 8.

The body member 8 is part of a dispensing valve 10 having a stem 12spring-biased to closed position by a spring 14 bearing against a flangeor collar 16 of the stem. The upper or outer side of collar 16 isprovided with a gasket 18 which releasably seals a port 20 of the bodymember 8 to cut off flow of fluid from the container member 2 to anozzle 22 of a ring 24 which is recessed 7} 2,822,961 Patented eb. 11,195 8 at 26 in the body member 8 and which clamps a diaphragm 28 againstthe top of the body member to' seal the open top thereof.

The stem 12 may be manually opened by the pressure of an operatorsfinger on the diaphragm 28, whereby fluid under pressure in thecontainer member is dispensed from the nozzle 22.

In the illustrated embodiments of the, invention the body member 2 isprovided with a tube 30 which extends almost to the bottom of thecontainer member 2, to deliver dispensed liquid 32 to the port 20.Normally the liquid 32 is dissolved in a low boiling point propellentliquid, such as Freon or ether, so that at room temperature thepropellent liquid boils to develop vapor pressure against the top ofthedispensed liquid until the pressure is sufiiciently high to preventfurther boiling of the propellent liquid at room temperature.

If the dispensed fluid is entirely vapor or gas under pressure, the tube30 may be eliminated.

As best seen in Figure 2, the opening 4 is sealed by a resilient gasket33 seated against the container member 2 externally thereof and seatedagainst a shoulder portion 34 of the valve body member 8. The gasket ismaintained under compression by a fusible washer 36 seated against thecontainer member 2 internally thereof and compressed by the flangeportion 6 which is crimped against the washer 36 as at 38.

The washer 36 is preferably formed of a lowmelting point alloy whichmelts or fuses at a temperature below 200 F. and preferably at about F.in order to release pressure in the container member 2 as shown inFigure 3.

However, the washer may be of any desired fusible material which fusesat a temperature below that at which pressure in the container member 2might explode the latter. Moreover, the washer, although illustrated asthicker than the gasket 33 may be paper thin, depending upon the amountof compression on the gasket 33 to seal the opening 4.

It may be noted with reference to Figure 3 that the crimped part 38 ofthe flange portion 6 is irregular and may even be split so that releaseof pressure in the container member 2 is ensured when the washer 36fuses.

It will be readily understood that in the embodiment of Figures 1-3, thegasket and washer may be reversed.

Referring now to Figure 4, which illustrates a modification whereinparts corresponding to those of Figures l-3 are identified bycorresponding numerals, it will be seen that the fusible washer 36 iscompressed between the gasket 33 and the shoulder portion34 of the valve.body member 8, the flange portion 6 thereof being crimped as at 38against the container memberZ-internally thereof.

Figure 5 illustrates another modification wherein the gasket 33 ispositioned internally of the container member 2, and the fusible washer36 is compressed against the gasket by the flange portion 6 which iscrimped against the washer 36 as at 38. In this modification theshoulder portion 34 of the valve body member 8 seats against thecontainer 2 externally thereof.

Referring now to Figure 6, the washer 36 is illustrated as a paper thindiaphragm compressed against the container externally thereof by thegasket 33 which is compressed against the shoulder portion 34 of thevalve body member 8. In this modification, the flange portion 6 iscrimped as at 38 against the container internally thereof. The washer 36and engaged surface of the container 2 are formed with very smoothinterengaged faces which seat in fluid tight engagement under thecompression of gasket 33.

Thus it will be understood that the invention comprehends an arrangementby which dangerous pressure within 3 an aerosol bomb is released bymelting of a fusible washer which maintains compression on a gasketsealing the connection between the container member and dispensing valveof the bomb. v

Other forms of the invention will be apparent to those skilled in theart without departing from the spirit of the invention or the scope ofthe appended claims.

What is claimed is:

1. An aerosol bomb comprising a container member containing fluid to bedispensed under superatmospheric pressure, a valve body having a flangeextending into an opening of said container member, a compressedresilient annular gasket tightly sleeved over said flange and'sealingsaid opening at one side thereof, means for maintaining said gasketunder compression comprising a fusible washer which fuses at atemperature below that at which said pressure causes said containermember to explode, said flange having a crimped portion at its inner endmaintaining said gasket and Washer under compressiomnormally closedreleasable valve means in said valve body, and a delivery tube encircledby said gasket and by said washer, said tube extending approximately tothe bottom of the container and being connected to the valve means todeliver said fluid therethrough upon release of said valve means. a

2. An aerosol bomb comprising a container containing fluid undersuperatmospheric pressure, a dispensing valve comprising a bodyextending into an opening of said'container, said valve body having ashoulder portion around said opening overlapping the containerexternally thereof, and said body having a flange portion around saidopen ing overlapping the container internally thereof, a fusible washerseated against one of said portions, said washer having a portion facingthe opening, a resilient gasket compressed between and against saidcontainer and one of said portions to aflord a seal around saidbody,said washer being fusible at a temperature below 200, E, and a deliverytube encircled by said gasket and bysaid washer, said tube beingconnected to the bottom of the valve body and extending approximately tothe bottom of the container to deliver fluid therefrom upon opening ofthe valve.

3. An aerosol bomb comprising a container member containing fluid undersuperatmospheric pressure, an opening in said container, a dispensingvalve comprising a body member received within said opening, a fusiblewasher member seated against one of said container and body members, aresilient gasket around said opening compressed by and between saidcontainer member and one of said body and gasket members to seal saidopening around said body, and a delivery tube encircled by said washermember and by said gasket, said tube extending through said opening andbeing connected to the valve body, and said tube extending approximatelyto the bottom of the container to deliver fluid therefrom upon actuationof the valve.

4. An aerosol bomb comprising a container containing fluid undersuperatmospheric pressure, an opening in said container, a valve body insaid opening, a resilient gasket sealing said opening at one sidethereof and compressed against a portion of said body around saidopening, means maintaining said gasket under compression comprising afusible washer under compression by said gasket, and a delivery tubeextending from approximately the bottom of the container through saidopening and said gas ket, said tube being connected to the valve body todeliver fluid therethrough.

5. A bomb according to claim 4, wherein the gasket is seated against thecontainer externally thereof and is seated against a shoulder of saidbody, the Washer being compressed against the container by a flange onsaid body inside said container.

6. A bomb according to claim 4 wherein the gasket is seated against thecontainer internally thereof and is clamped by a flange portion of saidbody, the washer being seated against the container externally thereofand against a vshoulder of said body.

7. A bomb according to claim 4, wherein the Washer is seated against ashoulder of said body, and the gasket is compressed between said washerand said container.

8. An aerosol bomb comprising a container member having an opening, avalve body having an annular flange extending into said opening, anannular crimped portion on the inner end of said flange, an annularshoulder on said body facing said crimped portion in alignmenttherewith, said shoulder being disposed externally of said opening, afusible washer member and a resilient gasket member sleeved on saidflange in alignment with a portion of the container defining saidopening and in alignment with said shoulder and crimped portion, saidgasket being under compression axially of the flange and acting tocompress said portions, said shoulder, said washer, and said gasket intoa stack, with said gasket sealing said opening, whereby fusing of thewasher releases compression on said gasket enabling pressure fluidwithin the container to by-pass said valve body and escape from saidopening externally of said flange References Cited in the file of thispatent UNITED STATES PATENTS 711,162 Holbach -Oct. 14, 1902 900,763McNutt Oct. 13, 1908 1,142,902 McNutt June 15, 1915 1,744,977 LovekinJan. 28, 1930 1,921,809 Crain Aug. 8, 1933 2,136,940 Ehbrecht Nov. 15,1938 2,305,286 Ward Dec. 15, 1942 2,506,983 Williams May 9, 19502,560,468 Morton July 10, 1951 2,643,914 Reswick June 30, 1953 2,647,721Volpin Aug. 4, 1953

